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Comparing Coro/Coro/State.xs (file contents):
Revision 1.27 by root, Mon Aug 20 16:58:19 2001 UTC vs.
Revision 1.136 by root, Fri Jan 12 01:05:55 2007 UTC

		1	#include "libcoro/coro.c"
		2
1	#include "EXTERN.h"	3	#include "EXTERN.h"
2	#include "perl.h"	4	#include "perl.h"
3	#include "XSUB.h"	5	#include "XSUB.h"
4		6
5	#include "libcoro/coro.c"	7	#include "patchlevel.h"
6		8
7	#include <signal.h>	9	#include <stdio.h>
		10	#include <errno.h>
		11	#include <assert.h>
8		12
9	#ifdef HAVE_MMAP	13	#ifdef HAVE_MMAP
10	# include <unistd.h>	14	# include <unistd.h>
11	# include <sys/mman.h>	15	# include <sys/mman.h>
12	# ifndef MAP_ANON
13	# ifdef MAP_ANONYMOUS	16	# ifndef MAP_ANONYMOUS
14	# define MAP_ANON MAP_ANONYMOUS	17	# ifdef MAP_ANON
		18	# define MAP_ANONYMOUS MAP_ANON
15	# else	19	# else
16	# undef HAVE_MMAP	20	# undef HAVE_MMAP
17	# endif	21	# endif
18	# endif	22	# endif
		23	# include <limits.h>
		24	# ifndef PAGESIZE
		25	# define PAGESIZE pagesize
		26	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
		27	static long pagesize;
		28	# else
		29	# define BOOT_PAGESIZE (void)0
19	#endif	30	# endif
		31	#else
		32	# define PAGESIZE 0
		33	# define BOOT_PAGESIZE (void)0
		34	#endif
20		35
21	#define MAY_FLUSH /* increases codesize */	36	#if USE_VALGRIND
		37	# include <valgrind/valgrind.h>
		38	#endif
22		39
23	#define SUB_INIT "Coro::State::initialize"	40	/* the maximum number of idle cctx that will be pooled */
24	#define UCORO_STATE "_coro_state"	41	#define MAX_IDLE_CCTX 8
25		42
		43	#define PERL_VERSION_ATLEAST(a,b,c) \
		44	(PERL_REVISION > (a) \
		45	|| (PERL_REVISION == (a) \
		46	&& (PERL_VERSION > (b) \
		47	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		48
		49	#if !PERL_VERSION_ATLEAST (5,6,0)
		50	# ifndef PL_ppaddr
		51	# define PL_ppaddr ppaddr
		52	# endif
		53	# ifndef call_sv
		54	# define call_sv perl_call_sv
		55	# endif
		56	# ifndef get_sv
		57	# define get_sv perl_get_sv
		58	# endif
		59	# ifndef get_cv
		60	# define get_cv perl_get_cv
		61	# endif
		62	# ifndef IS_PADGV
		63	# define IS_PADGV(v) 0
		64	# endif
		65	# ifndef IS_PADCONST
		66	# define IS_PADCONST(v) 0
		67	# endif
		68	#endif
		69
		70	/* 5.8.7 */
		71	#ifndef SvRV_set
		72	# define SvRV_set(s,v) SvRV(s) = (v)
		73	#endif
		74
		75	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
		76	# undef STACKGUARD
		77	#endif
		78
		79	#ifndef STACKGUARD
		80	# define STACKGUARD 0
		81	#endif
		82
		83	/* prefer perl internal functions over our own? */
		84	#ifndef PREFER_PERL_FUNCTIONS
		85	# define PREFER_PERL_FUNCTIONS 0
		86	#endif
		87
26	/* The next macro should delcare a variable stacklevel that contains and approximation	88	/* The next macro should declare a variable stacklevel that contains and approximation
27	* to the current C stack pointer. Its property is that it changes with each call	89	* to the current C stack pointer. Its property is that it changes with each call
28	* and should be unique. */	90	* and should be unique. */
		91	#define dSTACKLEVEL int stacklevel
29	#define dSTACKLEVEL void *stacklevel = &stacklevel	92	#define STACKLEVEL ((void *)&stacklevel)
30		93
31	#define labs(l) ((l) >= 0 ? (l) : -(l))	94	#define IN_DESTRUCT (PL_main_cv == Nullcv)
		95
		96	#if __GNUC__ >= 3
		97	# define attribute(x) __attribute__(x)
		98	# define BARRIER __asm__ __volatile__ ("" : : : "memory")
		99	#else
		100	# define attribute(x)
		101	# define BARRIER
		102	#endif
		103
		104	#define NOINLINE attribute ((noinline))
32		105
33	#include "CoroAPI.h"	106	#include "CoroAPI.h"
34		107
		108	#ifdef USE_ITHREADS
		109	static perl_mutex coro_mutex;
		110	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
		111	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
		112	#else
		113	# define LOCK (void)0
		114	# define UNLOCK (void)0
		115	#endif
		116
		117	/* helper storage struct for Coro::AIO */
		118	struct io_state
		119	{
		120	int errorno;
		121	I32 laststype;
		122	int laststatval;
		123	Stat_t statcache;
		124	};
		125
35	static struct CoroAPI coroapi;	126	static struct CoroAPI coroapi;
		127	static AV *main_mainstack; /* used to differentiate between $main and others */
		128	static HV *coro_state_stash, *coro_stash;
		129	static SV *coro_mortal; /* will be freed after next transfer */
36		130
37	/* this is actually not only the c stack but also c registers etc... */	131	static struct coro_cctx *cctx_first;
		132	static int cctx_count, cctx_idle;
		133
		134	/* this is a structure representing a c-level coroutine */
38	typedef struct {	135	typedef struct coro_cctx {
39	int refcnt; /* pointer reference counter */	136	struct coro_cctx *next;
40	int usecnt; /* shared by how many coroutines */
41	int gencnt; /* generation counter */
42		137
43	coro_context cctx;	138	/* the stack */
44
45	void *sptr;	139	void *sptr;
46	long ssize; /* positive == mmap, otherwise malloc */	140	long ssize; /* positive == mmap, otherwise malloc */
47	} coro_stack;
48		141
		142	/* cpu state */
		143	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		144	JMPENV *idle_te; /* same as idle_sp, but for top_env, TODO: remove once stable */
		145	JMPENV *top_env;
		146	coro_context cctx;
		147
		148	int inuse;
		149
		150	#if USE_VALGRIND
		151	int valgrind_id;
		152	#endif
		153	} coro_cctx;
		154
		155	enum {
		156	CF_RUNNING = 0x0001, /* coroutine is running */
		157	CF_READY = 0x0002, /* coroutine is ready */
		158	CF_NEW = 0x0004, /* has never been switched to */
		159	CF_DESTROYED = 0x0008, /* coroutine data has been freed */
		160	};
		161
		162	/* this is a structure representing a perl-level coroutine */
49	struct coro {	163	struct coro {
50	/* the optional C context */	164	/* the c coroutine allocated to this perl coroutine, if any */
51	coro_stack *stack;	165	coro_cctx *cctx;
52	void *cursp;
53	int gencnt;
54
55	/* optionally saved, might be zero */
56	AV *defav;
57	SV *defsv;
58	SV *errsv;
59
60	/* saved global state not related to stacks */
61	U8 dowarn;
62	I32 in_eval;
63
64	/* the stacks and related info (callchain etc..) */
65	PERL_SI *curstackinfo;
66	AV *curstack;
67	AV *mainstack;
68	SV **stack_sp;
69	OP *op;
70	SV **curpad;
71	SV **stack_base;
72	SV **stack_max;
73	SV **tmps_stack;
74	I32 tmps_floor;
75	I32 tmps_ix;
76	I32 tmps_max;
77	I32 *markstack;
78	I32 *markstack_ptr;
79	I32 *markstack_max;
80	I32 *scopestack;
81	I32 scopestack_ix;
82	I32 scopestack_max;
83	ANY *savestack;
84	I32 savestack_ix;
85	I32 savestack_max;
86	OP **retstack;
87	I32 retstack_ix;
88	I32 retstack_max;
89	COP *curcop;
90	JMPENV *top_env;
91		166
92	/* data associated with this coroutine (initial args) */	167	/* data associated with this coroutine (initial args) */
93	AV *args;	168	AV *args;
		169	int refcnt;
		170	int save; /* CORO_SAVE flags */
		171	int flags; /* CF_ flags */
		172
		173	/* optionally saved, might be zero */
		174	AV *defav; /* @_ */
		175	SV *defsv; /* $_ */
		176	SV *errsv; /* $@ */
		177	SV *irssv; /* $/ */
		178	SV *irssv_sv; /* real $/ cache */
		179
		180	#define VAR(name,type) type name;
		181	# include "state.h"
		182	#undef VAR
		183
		184	/* coro process data */
		185	int prio;
94	};	186	};
95		187
96	typedef struct coro *Coro__State;	188	typedef struct coro *Coro__State;
97	typedef struct coro *Coro__State_or_hashref;	189	typedef struct coro *Coro__State_or_hashref;
98		190
99	static AV *main_mainstack; /* used to differentiate between $main and others */	191	static AV *
100	static HV *coro_state_stash;	192	coro_clone_padlist (CV *cv)
101	static SV *ucoro_state_sv;
102	static U32 ucoro_state_hash;
103	static HV *padlist_cache;
104
105	/* mostly copied from op.c:cv_clone2 */
106	STATIC AV *
107	clone_padlist (AV *protopadlist)
108	{	193	{
109	AV *av;	194	AV *padlist = CvPADLIST (cv);
110	I32 ix;
111	AV *protopad_name = (AV *) * av_fetch (protopadlist, 0, FALSE);
112	AV *protopad = (AV *) * av_fetch (protopadlist, 1, FALSE);
113	SV **pname = AvARRAY (protopad_name);
114	SV **ppad = AvARRAY (protopad);
115	I32 fname = AvFILLp (protopad_name);
116	I32 fpad = AvFILLp (protopad);
117	AV *newpadlist, *newpad_name, *newpad;	195	AV *newpadlist, *newpad;
118	SV **npad;
119
120	newpad_name = newAV ();
121	for (ix = fname; ix >= 0; ix--)
122	av_store (newpad_name, ix, SvREFCNT_inc (pname[ix]));
123
124	newpad = newAV ();
125	av_fill (newpad, AvFILLp (protopad));
126	npad = AvARRAY (newpad);
127		196
128	newpadlist = newAV ();	197	newpadlist = newAV ();
129	AvREAL_off (newpadlist);	198	AvREAL_off (newpadlist);
130	av_store (newpadlist, 0, (SV *) newpad_name);	199	#if PERL_VERSION_ATLEAST (5,9,0)
		200	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		201	#else
		202	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
		203	#endif
		204	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
		205	--AvFILLp (padlist);
		206
		207	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
131	av_store (newpadlist, 1, (SV *) newpad);	208	av_store (newpadlist, 1, (SV *)newpad);
132		209
133	av = newAV (); /* will be @_ */	210	return newpadlist;
134	av_extend (av, 0);	211	}
135	av_store (newpad, 0, (SV *) av);
136	AvFLAGS (av) = AVf_REIFY;
137		212
138	for (ix = fpad; ix > 0; ix--)	213	static void
		214	free_padlist (AV *padlist)
		215	{
		216	/* may be during global destruction */
		217	if (SvREFCNT (padlist))
139	{	218	{
140	SV *namesv = (ix <= fname) ? pname[ix] : Nullsv;	219	I32 i = AvFILLp (padlist);
141	if (namesv && namesv != &PL_sv_undef)	220	while (i >= 0)
142	{	221	{
143	char *name = SvPVX (namesv); /* XXX */	222	SV **svp = av_fetch (padlist, i--, FALSE);
144	if (SvFLAGS (namesv) & SVf_FAKE || *name == '&')	223	if (svp)
145	{ /* lexical from outside? */
146	npad[ix] = SvREFCNT_inc (ppad[ix]);
147	}	224	{
148	else
149	{ /* our own lexical */
150	SV *sv;	225	SV *sv;
151	if (*name == '&')	226	while (&PL_sv_undef != (sv = av_pop ((AV *)*svp)))
152	sv = SvREFCNT_inc (ppad[ix]);	227	SvREFCNT_dec (sv);
153	else if (*name == '@')	228
154	sv = (SV *) newAV ();	229	SvREFCNT_dec (*svp);
155	else if (*name == '%')
156	sv = (SV *) newHV ();
157	else
158	sv = NEWSV (0, 0);
159	if (!SvPADBUSY (sv))
160	SvPADMY_on (sv);
161	npad[ix] = sv;
162	}	230	}
163	}	231	}
164	else if (IS_PADGV (ppad[ix]) || IS_PADCONST (ppad[ix]))
165	{
166	npad[ix] = SvREFCNT_inc (ppad[ix]);
167	}
168	else
169	{
170	SV *sv = NEWSV (0, 0);
171	SvPADTMP_on (sv);
172	npad[ix] = sv;
173	}
174	}
175		232
176	#if 0 /* return -ENOTUNDERSTOOD */
177	/* Now that vars are all in place, clone nested closures. */
178
179	for (ix = fpad; ix > 0; ix--) {
180	SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
181	if (namesv
182	&& namesv != &PL_sv_undef
183	&& !(SvFLAGS(namesv) & SVf_FAKE)
184	&& *SvPVX(namesv) == '&'
185	&& CvCLONE(ppad[ix]))
186	{
187	CV *kid = cv_clone((CV*)ppad[ix]);
188	SvREFCNT_dec(ppad[ix]);
189	CvCLONE_on(kid);
190	SvPADMY_on(kid);
191	npad[ix] = (SV*)kid;
192	}
193	}
194	#endif
195
196	return newpadlist;
197	}
198
199	#ifdef MAY_FLUSH
200	STATIC void
201	free_padlist (AV *padlist)
202	{
203	/* may be during global destruction */
204	if (SvREFCNT(padlist))
205	{
206	I32 i = AvFILLp(padlist);
207	while (i >= 0)
208	{
209	SV **svp = av_fetch(padlist, i--, FALSE);
210	SV *sv = svp ? *svp : Nullsv;
211	if (sv)
212	SvREFCNT_dec(sv);
213	}
214
215	SvREFCNT_dec((SV*)padlist);	233	SvREFCNT_dec ((SV*)padlist);
216	}	234	}
217	}	235	}
218	#endif	236
		237	static int
		238	coro_cv_free (pTHX_ SV *sv, MAGIC *mg)
		239	{
		240	AV *padlist;
		241	AV *av = (AV *)mg->mg_obj;
		242
		243	/* casting is fun. */
		244	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
		245	free_padlist (padlist);
		246
		247	SvREFCNT_dec (av);
		248
		249	return 0;
		250	}
		251
		252	#define PERL_MAGIC_coro PERL_MAGIC_ext
		253
		254	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
		255
		256	#define CORO_MAGIC(cv) \
		257	SvMAGIC (cv) \
		258	? SvMAGIC (cv)->mg_type == PERL_MAGIC_coro \
		259	? SvMAGIC (cv) \
		260	: mg_find ((SV *)cv, PERL_MAGIC_coro) \
		261	: 0
219		262
220	/* the next two functions merely cache the padlists */	263	/* the next two functions merely cache the padlists */
221	STATIC void	264	static void
222	get_padlist (CV *cv)	265	get_padlist (CV *cv)
223	{	266	{
224	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 0);	267	MAGIC *mg = CORO_MAGIC (cv);
		268	AV *av;
225		269
226	if (he && AvFILLp ((AV *)*he) >= 0)	270	if (mg && AvFILLp ((av = (AV *)mg->mg_obj)) >= 0)
227	CvPADLIST (cv) = (AV *)av_pop ((AV *)*he);	271	CvPADLIST (cv) = (AV *)AvARRAY (av)[AvFILLp (av)--];
228	else	272	else
		273	{
		274	#if PREFER_PERL_FUNCTIONS
		275	/* this is probably cleaner, but also slower? */
		276	CV *cp = Perl_cv_clone (cv);
		277	CvPADLIST (cv) = CvPADLIST (cp);
		278	CvPADLIST (cp) = 0;
		279	SvREFCNT_dec (cp);
		280	#else
229	CvPADLIST (cv) = clone_padlist (CvPADLIST (cv));	281	CvPADLIST (cv) = coro_clone_padlist (cv);
		282	#endif
		283	}
230	}	284	}
231		285
232	STATIC void	286	static void
233	put_padlist (CV *cv)	287	put_padlist (CV *cv)
234	{	288	{
235	SV **he = hv_fetch (padlist_cache, (void *)&cv, sizeof (CV *), 1);	289	MAGIC *mg = CORO_MAGIC (cv);
		290	AV *av;
236		291
237	if (SvTYPE (*he) != SVt_PVAV)	292	if (!mg)
238	{
239	SvREFCNT_dec (*he);
240	*he = (SV *)newAV ();
241	}	293	{
242		294	sv_magic ((SV *)cv, 0, PERL_MAGIC_coro, 0, 0);
243	av_push ((AV *)*he, (SV *)CvPADLIST (cv));	295	mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
244	}	296	mg->mg_virtual = &vtbl_coro;
245		297	mg->mg_obj = (SV *)newAV ();
246	#ifdef MAY_FLUSH
247	STATIC void
248	flush_padlist_cache ()
249	{
250	HV *hv = padlist_cache;
251	padlist_cache = newHV ();
252
253	if (hv_iterinit (hv))
254	{	298	}
255	HE *he;
256	AV *padlist;
257		299
258	while (!!(he = hv_iternext (hv)))	300	av = (AV *)mg->mg_obj;
259	{
260	AV *av = (AV *)HeVAL(he);
261		301
262	/* casting is fun. */	302	if (AvFILLp (av) >= AvMAX (av))
263	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	303	av_extend (av, AvMAX (av) + 1);
264	free_padlist (padlist);
265	}
266	}
267		304
268	SvREFCNT_dec (hv);	305	AvARRAY (av)[++AvFILLp (av)] = (SV *)CvPADLIST (cv);
269	}	306	}
270	#endif
271		307
272	#define SB do {	308	#define SB do {
273	#define SE } while (0)	309	#define SE } while (0)
274		310
275	#define LOAD(state) SB load_state(aTHX_ (state)); SPAGAIN; SE
276	#define SAVE(state,flags) SB PUTBACK; save_state(aTHX_ (state),(flags)); SE
277
278	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); SE	311	#define REPLACE_SV(sv,val) SB SvREFCNT_dec (sv); (sv) = (val); (val) = 0; SE
279		312
280	static void	313	static void
281	load_state(pTHX_ Coro__State c)	314	load_perl (Coro__State c)
282	{	315	{
283	PL_dowarn = c->dowarn;	316	#define VAR(name,type) PL_ ## name = c->name;
284	PL_in_eval = c->in_eval;	317	# include "state.h"
285		318	#undef VAR
286	PL_curstackinfo = c->curstackinfo;
287	PL_curstack = c->curstack;
288	PL_mainstack = c->mainstack;
289	PL_stack_sp = c->stack_sp;
290	PL_op = c->op;
291	PL_curpad = c->curpad;
292	PL_stack_base = c->stack_base;
293	PL_stack_max = c->stack_max;
294	PL_tmps_stack = c->tmps_stack;
295	PL_tmps_floor = c->tmps_floor;
296	PL_tmps_ix = c->tmps_ix;
297	PL_tmps_max = c->tmps_max;
298	PL_markstack = c->markstack;
299	PL_markstack_ptr = c->markstack_ptr;
300	PL_markstack_max = c->markstack_max;
301	PL_scopestack = c->scopestack;
302	PL_scopestack_ix = c->scopestack_ix;
303	PL_scopestack_max = c->scopestack_max;
304	PL_savestack = c->savestack;
305	PL_savestack_ix = c->savestack_ix;
306	PL_savestack_max = c->savestack_max;
307	PL_retstack = c->retstack;
308	PL_retstack_ix = c->retstack_ix;
309	PL_retstack_max = c->retstack_max;
310	PL_curcop = c->curcop;
311	PL_top_env = c->top_env;
312		319
313	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	320	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
314	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	321	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
315	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	322	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
		323	if (c->irssv)
		324	{
		325	if (c->irssv == PL_rs || sv_eq (PL_rs, c->irssv))
		326	SvREFCNT_dec (c->irssv);
		327	else
		328	{
		329	REPLACE_SV (PL_rs, c->irssv);
		330	if (!c->irssv_sv) c->irssv_sv = get_sv ("/", 0);
		331	sv_setsv (c->irssv_sv, PL_rs);
		332	}
		333	}
316		334
317	{	335	{
318	dSP;	336	dSP;
319	CV *cv;	337	CV *cv;
320		338
321	/* now do the ugly restore mess */	339	/* now do the ugly restore mess */
322	while ((cv = (CV *)POPs))	340	while ((cv = (CV *)POPs))
323	{	341	{
324	AV *padlist = (AV *)POPs;
325
326	if (padlist)
327	{
328	put_padlist (cv); /* mark this padlist as available */	342	put_padlist (cv); /* mark this padlist as available */
329	CvPADLIST(cv) = padlist;	343	CvDEPTH (cv) = PTR2IV (POPs);
330	#ifdef USE_THREADS	344	CvPADLIST (cv) = (AV *)POPs;
331	/*CvOWNER(cv) = (struct perl_thread *)POPs;*/
332	#endif
333	}
334
335	++CvDEPTH(cv);
336	}	345	}
337		346
338	PUTBACK;	347	PUTBACK;
339	}	348	}
340	}	349	}
341		350
342	static void	351	static void
343	save_state(pTHX_ Coro__State c, int flags)	352	save_perl (Coro__State c)
344	{	353	{
345	{	354	{
346	dSP;	355	dSP;
347	I32 cxix = cxstack_ix;	356	I32 cxix = cxstack_ix;
348	PERL_CONTEXT *ccstk = cxstack;	357	PERL_CONTEXT *ccstk = cxstack;
…		…
351	/*	360	/*
352	* the worst thing you can imagine happens first - we have to save	361	* the worst thing you can imagine happens first - we have to save
353	* (and reinitialize) all cv's in the whole callchain :(	362	* (and reinitialize) all cv's in the whole callchain :(
354	*/	363	*/
355		364
		365	EXTEND (SP, 3 + 1);
356	PUSHs (Nullsv);	366	PUSHs (Nullsv);
357	/* this loop was inspired by pp_caller */	367	/* this loop was inspired by pp_caller */
358	for (;;)	368	for (;;)
359	{	369	{
360	do	370	while (cxix >= 0)
361	{	371	{
362	PERL_CONTEXT *cx = &ccstk[cxix--];	372	PERL_CONTEXT *cx = &ccstk[cxix--];
363		373
364	if (CxTYPE(cx) == CXt_SUB)	374	if (CxTYPE (cx) == CXt_SUB)
365	{	375	{
366	CV *cv = cx->blk_sub.cv;	376	CV *cv = cx->blk_sub.cv;
		377
367	if (CvDEPTH(cv))	378	if (CvDEPTH (cv))
368	{	379	{
369	#ifdef USE_THREADS
370	/*XPUSHs ((SV *)CvOWNER(cv));*/
371	/*CvOWNER(cv) = 0;*/
372	/*error must unlock this cv etc.. etc...*/
373	#endif
374	EXTEND (SP, CvDEPTH(cv)*2);	380	EXTEND (SP, 3);
375
376	while (--CvDEPTH(cv))
377	{
378	/* this tells the restore code to increment CvDEPTH */
379	PUSHs (Nullsv);
380	PUSHs ((SV *)cv);
381	}
382
383	PUSHs ((SV *)CvPADLIST(cv));	381	PUSHs ((SV *)CvPADLIST (cv));
		382	PUSHs (INT2PTR (SV *, CvDEPTH (cv)));
384	PUSHs ((SV *)cv);	383	PUSHs ((SV *)cv);
385		384
		385	CvDEPTH (cv) = 0;
386	get_padlist (cv); /* this is a monster */	386	get_padlist (cv);
387	}	387	}
388	}	388	}
389	else if (CxTYPE(cx) == CXt_FORMAT)
390	{
391	/* I never used formats, so how should I know how these are implemented? */
392	/* my bold guess is as a simple, plain sub... */
393	croak ("CXt_FORMAT not yet handled. Don't switch coroutines from within formats");
394	}
395	}	389	}
396	while (cxix >= 0);
397		390
398	if (top_si->si_type == PERLSI_MAIN)	391	if (top_si->si_type == PERLSI_MAIN)
399	break;	392	break;
400		393
401	top_si = top_si->si_prev;	394	top_si = top_si->si_prev;
…		…
404	}	397	}
405		398
406	PUTBACK;	399	PUTBACK;
407	}	400	}
408		401
409	c->defav = flags & TRANSFER_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;	402	c->defav = c->save & CORO_SAVE_DEFAV ? (AV *)SvREFCNT_inc (GvAV (PL_defgv)) : 0;
410	c->defsv = flags & TRANSFER_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;	403	c->defsv = c->save & CORO_SAVE_DEFSV ? SvREFCNT_inc (DEFSV) : 0;
411	c->errsv = flags & TRANSFER_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;	404	c->errsv = c->save & CORO_SAVE_ERRSV ? SvREFCNT_inc (ERRSV) : 0;
		405	c->irssv = c->save & CORO_SAVE_IRSSV ? SvREFCNT_inc (PL_rs) : 0;
412		406
413	/* I have not the slightest idea of why av_reify is necessary */	407	#define VAR(name,type)c->name = PL_ ## name;
414	/* but if it's missing the defav contents magically get replaced sometimes */	408	# include "state.h"
415	if (c->defav)	409	#undef VAR
416	av_reify (c->defav);
417
418	c->dowarn = PL_dowarn;
419	c->in_eval = PL_in_eval;
420
421	c->curstackinfo = PL_curstackinfo;
422	c->curstack = PL_curstack;
423	c->mainstack = PL_mainstack;
424	c->stack_sp = PL_stack_sp;
425	c->op = PL_op;
426	c->curpad = PL_curpad;
427	c->stack_base = PL_stack_base;
428	c->stack_max = PL_stack_max;
429	c->tmps_stack = PL_tmps_stack;
430	c->tmps_floor = PL_tmps_floor;
431	c->tmps_ix = PL_tmps_ix;
432	c->tmps_max = PL_tmps_max;
433	c->markstack = PL_markstack;
434	c->markstack_ptr = PL_markstack_ptr;
435	c->markstack_max = PL_markstack_max;
436	c->scopestack = PL_scopestack;
437	c->scopestack_ix = PL_scopestack_ix;
438	c->scopestack_max = PL_scopestack_max;
439	c->savestack = PL_savestack;
440	c->savestack_ix = PL_savestack_ix;
441	c->savestack_max = PL_savestack_max;
442	c->retstack = PL_retstack;
443	c->retstack_ix = PL_retstack_ix;
444	c->retstack_max = PL_retstack_max;
445	c->curcop = PL_curcop;
446	c->top_env = PL_top_env;
447	}	410	}
448		411
449	/*	412	/*
450	* allocate various perl stacks. This is an exact copy	413	* allocate various perl stacks. This is an exact copy
451	* of perl.c:init_stacks, except that it uses less memory	414	* of perl.c:init_stacks, except that it uses less memory
452	* on the assumption that coroutines do not usually need	415	* on the (sometimes correct) assumption that coroutines do
453	* a lot of stackspace.	416	* not usually need a lot of stackspace.
454	*/	417	*/
455	STATIC void	418	#if PREFER_PERL_FUNCTIONS
		419	# define coro_init_stacks init_stacks
		420	#else
		421	static void
456	coro_init_stacks (pTHX)	422	coro_init_stacks ()
457	{	423	{
458	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	424	PL_curstackinfo = new_stackinfo(128, 1024/sizeof(PERL_CONTEXT));
459	PL_curstackinfo->si_type = PERLSI_MAIN;	425	PL_curstackinfo->si_type = PERLSI_MAIN;
460	PL_curstack = PL_curstackinfo->si_stack;	426	PL_curstack = PL_curstackinfo->si_stack;
461	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	427	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
462		428
463	PL_stack_base = AvARRAY(PL_curstack);	429	PL_stack_base = AvARRAY(PL_curstack);
464	PL_stack_sp = PL_stack_base;	430	PL_stack_sp = PL_stack_base;
465	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);	431	PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
466		432
467	New(50,PL_tmps_stack,96,SV*);	433	New(50,PL_tmps_stack,128,SV*);
468	PL_tmps_floor = -1;	434	PL_tmps_floor = -1;
469	PL_tmps_ix = -1;	435	PL_tmps_ix = -1;
470	PL_tmps_max = 96;	436	PL_tmps_max = 128;
471		437
472	New(54,PL_markstack,16,I32);	438	New(54,PL_markstack,32,I32);
473	PL_markstack_ptr = PL_markstack;	439	PL_markstack_ptr = PL_markstack;
474	PL_markstack_max = PL_markstack + 16;	440	PL_markstack_max = PL_markstack + 32;
475		441
		442	#ifdef SET_MARK_OFFSET
476	SET_MARK_OFFSET;	443	SET_MARK_OFFSET;
		444	#endif
477		445
478	New(54,PL_scopestack,16,I32);	446	New(54,PL_scopestack,32,I32);
479	PL_scopestack_ix = 0;	447	PL_scopestack_ix = 0;
480	PL_scopestack_max = 16;	448	PL_scopestack_max = 32;
481		449
482	New(54,PL_savestack,96,ANY);	450	New(54,PL_savestack,64,ANY);
483	PL_savestack_ix = 0;	451	PL_savestack_ix = 0;
484	PL_savestack_max = 96;	452	PL_savestack_max = 64;
485		453
		454	#if !PERL_VERSION_ATLEAST (5,9,0)
486	New(54,PL_retstack,8,OP*);	455	New(54,PL_retstack,16,OP*);
487	PL_retstack_ix = 0;	456	PL_retstack_ix = 0;
488	PL_retstack_max = 8;	457	PL_retstack_max = 16;
		458	#endif
489	}	459	}
		460	#endif
490		461
491	/*	462	/*
492	* destroy the stacks, the callchain etc...	463	* destroy the stacks, the callchain etc...
493	* still there is a memleak of 128 bytes...
494	*/	464	*/
495	STATIC void	465	static void
496	destroy_stacks(pTHX)	466	coro_destroy_stacks ()
497	{	467	{
498	/* is this ugly, I ask? */	468	if (!IN_DESTRUCT)
499	while (PL_scopestack_ix)	469	{
500	LEAVE;	470	/* restore all saved variables and stuff */
		471	LEAVE_SCOPE (0);
		472	assert (PL_tmps_floor == -1);
501		473
502	/* sure it is, but more important: is it correct?? :/ */	474	/* free all temporaries */
503	while (PL_tmps_ix > PL_tmps_floor) /* should only ever be one iteration */
504	FREETMPS;	475	FREETMPS;
		476	assert (PL_tmps_ix == -1);
		477
		478	/* unwind all extra stacks */
		479	POPSTACK_TO (PL_mainstack);
		480
		481	/* unwind main stack */
		482	dounwind (-1);
		483	}
505		484
506	while (PL_curstackinfo->si_next)	485	while (PL_curstackinfo->si_next)
507	PL_curstackinfo = PL_curstackinfo->si_next;	486	PL_curstackinfo = PL_curstackinfo->si_next;
508		487
509	while (PL_curstackinfo)	488	while (PL_curstackinfo)
510	{	489	{
511	PERL_SI *p = PL_curstackinfo->si_prev;	490	PERL_SI *p = PL_curstackinfo->si_prev;
512		491
513	{	492	if (!IN_DESTRUCT)
514	dSP;
515	SWITCHSTACK (PL_curstack, PL_curstackinfo->si_stack);
516	PUTBACK; /* possibly superfluous */
517	}
518
519	if (PL_main_cv != Nullcv) /* don't during destruction. hack? */
520	dounwind(-1);
521
522	SvREFCNT_dec(PL_curstackinfo->si_stack);	493	SvREFCNT_dec (PL_curstackinfo->si_stack);
		494
523	Safefree(PL_curstackinfo->si_cxstack);	495	Safefree (PL_curstackinfo->si_cxstack);
524	Safefree(PL_curstackinfo);	496	Safefree (PL_curstackinfo);
525	PL_curstackinfo = p;	497	PL_curstackinfo = p;
526	}	498	}
527		499
528	Safefree(PL_tmps_stack);	500	Safefree (PL_tmps_stack);
529	Safefree(PL_markstack);	501	Safefree (PL_markstack);
530	Safefree(PL_scopestack);	502	Safefree (PL_scopestack);
531	Safefree(PL_savestack);	503	Safefree (PL_savestack);
		504	#if !PERL_VERSION_ATLEAST (5,9,0)
532	Safefree(PL_retstack);	505	Safefree (PL_retstack);
533	}
534
535	static void
536	allocate_stack (Coro__State ctx, int alloc)
537	{
538	coro_stack *stack;
539
540	New (0, stack, 1, coro_stack);
541
542	stack->refcnt = 1;
543	stack->usecnt = 1;
544	stack->gencnt = ctx->gencnt = 0;
545	if (alloc)
546	{
547	#ifdef HAVE_MMAP
548	stack->ssize = 128 * 1024 * sizeof (long); /* mmap should do allocate-on-write for us */
549	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, 0, 0);
550	if (stack->sptr == (void *)-1)
551	#endif	506	#endif
552	{
553	/*FIXME*//*D*//* reasonable stack size! */
554	stack->ssize = -4096 * sizeof (long);
555	New (0, stack->sptr, 4096, long);
556	}
557	}
558	else
559	stack->sptr = 0;
560
561	ctx->stack = stack;
562	}	507	}
563		508
564	static void	509	static void
565	deallocate_stack (Coro__State ctx)	510	setup_coro (struct coro *coro)
566	{
567	coro_stack *stack = ctx->stack;
568
569	ctx->stack = 0;
570
571	if (stack)
572	{
573	if (!--stack->refcnt)
574	{
575	#ifdef HAVE_MMAP
576	if (stack->ssize > 0 && stack->sptr)
577	munmap (stack->sptr, stack->ssize);
578	else
579	#else
580	Safefree (stack->sptr);
581	#endif
582	Safefree (stack);
583	}
584	else if (ctx->gencnt == stack->gencnt)
585	--stack->usecnt;
586	}
587	}
588
589	static void
590	setup_coro (void *arg)
591	{	511	{
592	/*	512	/*
593	* emulate part of the perl startup here.	513	* emulate part of the perl startup here.
594	*/	514	*/
		515
		516	coro_init_stacks ();
		517
		518	PL_curcop = &PL_compiling;
		519	PL_in_eval = EVAL_NULL;
		520	PL_curpm = 0;
		521	PL_localizing = 0;
		522	PL_dirty = 0;
		523	PL_restartop = 0;
		524
		525	{
		526	dSP;
		527	LOGOP myop;
		528
		529	SvREFCNT_dec (GvAV (PL_defgv));
		530	GvAV (PL_defgv) = coro->args; coro->args = 0;
		531
		532	Zero (&myop, 1, LOGOP);
		533	myop.op_next = Nullop;
		534	myop.op_flags = OPf_WANT_VOID;
		535
		536	PUSHMARK (SP);
		537	XPUSHs ((SV *)get_cv ("Coro::State::_coro_init", FALSE));
		538	PUTBACK;
		539	PL_op = (OP *)&myop;
		540	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
		541	SPAGAIN;
		542	}
		543
		544	ENTER; /* necessary e.g. for dounwind */
		545	}
		546
		547	static void
		548	free_coro_mortal ()
		549	{
		550	if (coro_mortal)
		551	{
		552	SvREFCNT_dec (coro_mortal);
		553	coro_mortal = 0;
		554	}
		555	}
		556
		557	/* inject a fake call to Coro::State::_cctx_init into the execution */
		558	static void NOINLINE
		559	prepare_cctx (coro_cctx *cctx)
		560	{
595	dSP;	561	dSP;
596	Coro__State ctx = (Coro__State)arg;	562	LOGOP myop;
597	SV *sub_init = (SV*)get_cv(SUB_INIT, FALSE);
598		563
599	coro_init_stacks (aTHX);	564	Zero (&myop, 1, LOGOP);
600	/*PL_curcop = 0;*/	565	myop.op_next = PL_op;
601	/*PL_in_eval = PL_in_eval;*/ /* inherit */	566	myop.op_flags = OPf_WANT_VOID | OPf_STACKED;
602	SvREFCNT_dec (GvAV (PL_defgv));
603	GvAV (PL_defgv) = ctx->args;
604		567
		568	PUSHMARK (SP);
		569	EXTEND (SP, 2);
		570	PUSHs (sv_2mortal (newSViv (PTR2IV (cctx))));
		571	PUSHs ((SV *)get_cv ("Coro::State::_cctx_init", FALSE));
		572	PUTBACK;
		573	PL_op = (OP *)&myop;
		574	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
605	SPAGAIN;	575	SPAGAIN;
606
607	if (ctx->stack)
608	{
609	ctx->cursp = 0;
610
611	PUSHMARK(SP);
612	PUTBACK;
613	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
614
615	if (SvTRUE (ERRSV))
616	croak (NULL);
617	else
618	croak ("FATAL: CCTXT coroutine returned!");
619	}
620	else
621	{
622	UNOP myop;
623
624	PL_op = (OP *)&myop;
625
626	Zero(&myop, 1, UNOP);
627	myop.op_next = Nullop;
628	myop.op_flags = OPf_WANT_VOID;
629
630	PUSHMARK(SP);
631	XPUSHs (sub_init);
632	/*
633	* the next line is slightly wrong, as PL_op->op_next
634	* is actually being executed so we skip the first op.
635	* that doesn't matter, though, since it is only
636	* pp_nextstate and we never return...
637	* ah yes, and I don't care anyways ;)
638	*/
639	PUTBACK;
640	PL_op = pp_entersub();
641	SPAGAIN;
642
643	ENTER; /* necessary e.g. for dounwind */
644	}
645	}	576	}
646		577
647	static void	578	static void
648	continue_coro (void *arg)	579	coro_run (void *arg)
649	{	580	{
		581	/* coro_run is the alternative tail of transfer(), so unlock here. */
		582	UNLOCK;
		583
650	/*	584	/*
651	* this is a _very_ stripped down perl interpreter ;)	585	* this is a _very_ stripped down perl interpreter ;)
652	*/	586	*/
653	Coro__State ctx = (Coro__State)arg;	587	PL_top_env = &PL_start_env;
654		588
655	/*FIXME*//* must set up top_env here */	589	/* inject call to cctx_init */
656	ctx->cursp = 0;	590	prepare_cctx ((coro_cctx *)arg);
657	PL_op = PL_op->op_next;
658	CALLRUNOPS(aTHX);
659		591
		592	/* somebody will hit me for both perl_run and PL_restartop */
		593	PL_restartop = PL_op;
		594	perl_run (PL_curinterp);
		595
		596	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
660	abort ();	597	abort ();
661	}	598	}
662		599
663	STATIC void	600	static coro_cctx *
		601	cctx_new ()
		602	{
		603	coro_cctx *cctx;
		604
		605	++cctx_count;
		606
		607	Newz (0, cctx, 1, coro_cctx);
		608
		609	#if HAVE_MMAP
		610
		611	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		612	/* mmap supposedly does allocate-on-write for us */
		613	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		614
		615	if (cctx->sptr == (void *)-1)
		616	{
		617	perror ("FATAL: unable to mmap stack for coroutine");
		618	_exit (EXIT_FAILURE);
		619	}
		620
		621	# if STACKGUARD
		622	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		623	# endif
		624
		625	#else
		626
		627	cctx->ssize = STACKSIZE * (long)sizeof (long);
		628	New (0, cctx->sptr, STACKSIZE, long);
		629
		630	if (!cctx->sptr)
		631	{
		632	perror ("FATAL: unable to malloc stack for coroutine");
		633	_exit (EXIT_FAILURE);
		634	}
		635
		636	#endif
		637
		638	#if USE_VALGRIND
		639	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		640	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		641	cctx->ssize + (char *)cctx->sptr
		642	);
		643	#endif
		644
		645	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		646
		647	return cctx;
		648	}
		649
		650	static void
		651	cctx_destroy (coro_cctx *cctx)
		652	{
		653	if (!cctx)
		654	return;
		655
		656	--cctx_count;
		657
		658	#if USE_VALGRIND
		659	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		660	#endif
		661
		662	#if HAVE_MMAP
		663	munmap (cctx->sptr, cctx->ssize);
		664	#else
		665	Safefree (cctx->sptr);
		666	#endif
		667
		668	Safefree (cctx);
		669	}
		670
		671	static coro_cctx *
		672	cctx_get ()
		673	{
		674	coro_cctx *cctx;
		675
		676	if (cctx_first)
		677	{
		678	cctx = cctx_first;
		679	cctx_first = cctx->next;
		680	--cctx_idle;
		681	}
		682	else
		683	{
		684	cctx = cctx_new ();
		685	PL_op = PL_op->op_next;
		686	}
		687
		688	return cctx;
		689	}
		690
		691	static void
		692	cctx_put (coro_cctx *cctx)
		693	{
		694	/* free another cctx if overlimit */
		695	if (cctx_idle >= MAX_IDLE_CCTX)
		696	{
		697	coro_cctx *first = cctx_first;
		698	cctx_first = first->next;
		699	--cctx_idle;
		700
		701	assert (!first->inuse);
		702	cctx_destroy (first);
		703	}
		704
		705	++cctx_idle;
		706	cctx->next = cctx_first;
		707	cctx_first = cctx;
		708	}
		709
		710	/* never call directly, always through the coro_state_transfer global variable */
		711	static void NOINLINE
664	transfer(pTHX_ struct coro *prev, struct coro *next, int flags)	712	transfer (struct coro *prev, struct coro *next)
665	{	713	{
666	dSP;
667	dSTACKLEVEL;	714	dSTACKLEVEL;
668		715
		716	/* sometimes transfer is only called to set idle_sp */
		717	if (!next)
		718	{
		719	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		720	assert (((coro_cctx *)prev)->idle_te = PL_top_env); /* just for the side-effect when asserts are enabled */
		721	}
669	if (prev != next)	722	else if (prev != next)
670	{	723	{
671	if (next->mainstack)	724	coro_cctx *prev__cctx;
		725
		726	if (prev->flags & CF_NEW)
672	{	727	{
673	SAVE (prev, flags);	728	/* create a new empty context */
674	LOAD (next);	729	Newz (0, prev->cctx, 1, coro_cctx);
675		730	prev->cctx->inuse = 1;
676	/* mark this state as in-use */	731	prev->flags &= ~CF_NEW;
677	next->mainstack = 0;	732	prev->flags |= CF_RUNNING;
678	next->tmps_ix = -2;
679
680	/* stacklevel changed? if yes, grab the stack for us! */
681	if (flags & TRANSFER_SAVE_CCTXT)
682	{
683	if (!prev->stack)
684	allocate_stack (prev, 0);
685	else if (prev->cursp != stacklevel
686	&& prev->stack->usecnt > 1)
687	{
688	prev->gencnt = ++prev->stack->gencnt;
689	prev->stack->usecnt = 1;
690	}
691
692	/* has our stack been invalidated? */
693	if (next->stack && next->stack->gencnt != next->gencnt)
694	{
695	deallocate_stack (next);
696	allocate_stack (next, 1);
697	coro_create (&(next->stack->cctx),
698	continue_coro, (void *)next,
699	next->stack->sptr, labs (next->stack->ssize));
700	}
701
702	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
703	}
704
705	}	733	}
706	else if (next->tmps_ix == -2)	734
707	croak ("tried to transfer to running coroutine");	735	/*TODO: must not croak here */
		736	if (!prev->flags & CF_RUNNING)
		737	croak ("Coro::State::transfer called with non-running prev Coro::State, but can only transfer from running states");
		738
		739	if (next->flags & CF_RUNNING)
		740	croak ("Coro::State::transfer called with running next Coro::State, but can only transfer to inactive states");
		741
		742	if (next->flags & CF_DESTROYED)
		743	croak ("Coro::State::transfer called with destroyed next Coro::State, but can only transfer to inactive states");
		744
		745	prev->flags &= ~CF_RUNNING;
		746	next->flags |= CF_RUNNING;
		747
		748	LOCK;
		749
		750	if (next->flags & CF_NEW)
		751	{
		752	/* need to start coroutine */
		753	next->flags &= ~CF_NEW;
		754	/* first get rid of the old state */
		755	save_perl (prev);
		756	/* setup coroutine call */
		757	setup_coro (next);
		758	/* need a new stack */
		759	assert (!next->cctx);
		760	}
708	else	761	else
709	{	762	{
710	SAVE (prev, -1); /* first get rid of the old state */	763	/* coroutine already started */
711		764	save_perl (prev);
712	if (flags & TRANSFER_SAVE_CCTXT)	765	load_perl (next);
713	{
714	if (!prev->stack)
715	allocate_stack (prev, 0);
716
717	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
718	{
719	setup_coro (next);
720
721	prev->stack->refcnt++;
722	prev->stack->usecnt++;
723	next->stack = prev->stack;
724	next->gencnt = prev->gencnt;
725	}
726	else
727	{
728	allocate_stack (next, 1);
729	coro_create (&(next->stack->cctx),
730	setup_coro, (void *)next,
731	next->stack->sptr, labs (next->stack->ssize));
732	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
733	}
734	}
735	else
736	setup_coro (next);
737	}	766	}
		767
		768	prev__cctx = prev->cctx;
		769
		770	/* possibly "free" the cctx */
		771	if (prev__cctx->idle_sp == STACKLEVEL)
		772	{
		773	/* I assume that STACKLEVEL is a stronger indicator than PL_top_env changes */
		774	assert (("ERROR: current top_env must equal previous top_env", PL_top_env == prev__cctx->idle_te));
		775
		776	prev->cctx = 0;
		777
		778	cctx_put (prev__cctx);
		779	prev__cctx->inuse = 0;
		780	}
		781
		782	if (!next->cctx)
		783	{
		784	next->cctx = cctx_get ();
		785	assert (!next->cctx->inuse);
		786	next->cctx->inuse = 1;
		787	}
		788
		789	if (prev__cctx != next->cctx)
		790	{
		791	prev__cctx->top_env = PL_top_env;
		792	PL_top_env = next->cctx->top_env;
		793	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		794	}
		795
		796	free_coro_mortal ();
		797	UNLOCK;
		798	}
		799	}
		800
		801	struct transfer_args
		802	{
		803	struct coro *prev, *next;
		804	};
		805
		806	#define TRANSFER(ta) transfer ((ta).prev, (ta).next)
		807
		808	static int
		809	coro_state_destroy (struct coro *coro)
		810	{
		811	if (coro->flags & CF_DESTROYED)
		812	return 0;
		813
		814	coro->flags |= CF_DESTROYED;
		815
		816	if (coro->mainstack && coro->mainstack != main_mainstack)
738	}	817	{
		818	assert (!(coro->flags & CF_RUNNING));
739		819
740	next->cursp = stacklevel;	820	struct coro temp;
		821	Zero (&temp, 1, struct coro);
		822	temp.save = CORO_SAVE_ALL;
		823
		824	if (coro->flags & CF_RUNNING)
		825	croak ("FATAL: tried to destroy currently running coroutine");
		826
		827	save_perl (&temp);
		828	load_perl (coro);
		829
		830	coro_destroy_stacks ();
		831
		832	load_perl (&temp); /* this will get rid of defsv etc.. */
		833
		834	coro->mainstack = 0;
		835	}
		836
		837	cctx_destroy (coro->cctx);
		838	SvREFCNT_dec (coro->args);
		839
		840	return 1;
741	}	841	}
		842
		843	static int
		844	coro_state_free (pTHX_ SV *sv, MAGIC *mg)
		845	{
		846	struct coro *coro = (struct coro *)mg->mg_ptr;
		847	mg->mg_ptr = 0;
		848
		849	if (--coro->refcnt < 0)
		850	{
		851	coro_state_destroy (coro);
		852	Safefree (coro);
		853	}
		854
		855	return 0;
		856	}
		857
		858	static int
		859	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		860	{
		861	struct coro *coro = (struct coro *)mg->mg_ptr;
		862
		863	++coro->refcnt;
		864
		865	return 0;
		866	}
		867
		868	static MGVTBL coro_state_vtbl = {
		869	0, 0, 0, 0,
		870	coro_state_free,
		871	0,
		872	#ifdef MGf_DUP
		873	coro_state_dup,
		874	#else
		875	# define MGf_DUP 0
		876	#endif
		877	};
742		878
743	static struct coro *	879	static struct coro *
744	sv_to_coro (SV *arg, const char *funcname, const char *varname)	880	SvSTATE (SV *coro)
745	{	881	{
746	if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVHV)	882	HV *stash;
747	{	883	MAGIC *mg;
748	HE *he = hv_fetch_ent((HV *)SvRV(arg), ucoro_state_sv, 0, ucoro_state_hash);
749		884
750	if (!he)	885	if (SvROK (coro))
751	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", funcname, varname);	886	coro = SvRV (coro);
752		887
753	arg = HeVAL(he);	888	stash = SvSTASH (coro);
		889	if (stash != coro_stash && stash != coro_state_stash)
754	}	890	{
		891	/* very slow, but rare, check */
		892	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		893	croak ("Coro::State object required");
755		894	}
756	/* must also be changed inside Coro::Cont::yield */
757	if (SvROK(arg) && SvSTASH(SvRV(arg)) == coro_state_stash)
758	return (struct coro *) SvIV((SV*)SvRV(arg));
759		895
760	croak ("%s() -- %s is not (and contains not) a Coro::State object", funcname, varname);	896	mg = SvMAGIC (coro);
761	/*NORETURN*/	897	assert (mg->mg_type == PERL_MAGIC_ext);
		898	return (struct coro *)mg->mg_ptr;
762	}	899	}
763		900
		901	static void
		902	prepare_transfer (struct transfer_args *ta, SV *prev_sv, SV *next_sv)
		903	{
		904	ta->prev = SvSTATE (prev_sv);
		905	ta->next = SvSTATE (next_sv);
		906	}
		907
		908	static void
		909	api_transfer (SV *prev_sv, SV *next_sv)
		910	{
		911	struct transfer_args ta;
		912
		913	prepare_transfer (&ta, prev_sv, next_sv);
		914	TRANSFER (ta);
		915	}
		916
764	static void	917	static int
765	api_transfer(pTHX_ SV *prev, SV *next, int flags)	918	api_save (SV *coro_sv, int new_save)
766	{	919	{
767	transfer(aTHX_	920	struct coro *coro = SvSTATE (coro_sv);
768	sv_to_coro (prev, "Coro::transfer", "prev"),	921	int old_save = coro->save;
769	sv_to_coro (next, "Coro::transfer", "next"),	922
770	flags);	923	if (new_save >= 0)
		924	coro->save = new_save;
		925
		926	return old_save;
771	}	927	}
772		928
773	/** Coro ********************************************************************/	929	/** Coro ********************************************************************/
774		930
775	#define PRIO_MAX 3	931	#define PRIO_MAX 3
…		…
778	#define PRIO_LOW -1	934	#define PRIO_LOW -1
779	#define PRIO_IDLE -3	935	#define PRIO_IDLE -3
780	#define PRIO_MIN -4	936	#define PRIO_MIN -4
781		937
782	/* for Coro.pm */	938	/* for Coro.pm */
783	static GV *coro_current, *coro_idle;	939	static SV *coro_current;
784	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	940	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
785	static int coro_nready;	941	static int coro_nready;
786		942
787	static void	943	static void
788	coro_enq (SV *sv)	944	coro_enq (SV *coro_sv)
789	{	945	{
790	if (SvROK (sv))	946	av_push (coro_ready [SvSTATE (coro_sv)->prio - PRIO_MIN], coro_sv);
791	{
792	SV *hv = SvRV (sv);
793	if (SvTYPE (hv) == SVt_PVHV)
794	{
795	SV **xprio = hv_fetch ((HV *)hv, "prio", 4, 0);
796	int prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
797
798	prio = prio > PRIO_MAX ? PRIO_MAX
799	: prio < PRIO_MIN ? PRIO_MIN
800	: prio;
801
802	av_push (coro_ready [prio - PRIO_MIN], sv);
803	coro_nready++;	947	coro_nready++;
804
805	return;
806	}
807	}
808
809	croak ("Coro::ready tried to enqueue something that is not a coroutine");
810	}	948	}
811		949
812	static SV *	950	static SV *
813	coro_deq (int min_prio)	951	coro_deq (int min_prio)
814	{	952	{
…		…
817	min_prio -= PRIO_MIN;	955	min_prio -= PRIO_MIN;
818	if (min_prio < 0)	956	if (min_prio < 0)
819	min_prio = 0;	957	min_prio = 0;
820		958
821	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	959	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
822	if (av_len (coro_ready[prio]) >= 0)	960	if (AvFILLp (coro_ready [prio]) >= 0)
823	{	961	{
824	coro_nready--;	962	coro_nready--;
825	return av_shift (coro_ready[prio]);	963	return av_shift (coro_ready [prio]);
826	}	964	}
827		965
828	return 0;	966	return 0;
829	}	967	}
830		968
831	static void	969	static int
832	api_ready (SV *coro)	970	api_ready (SV *coro_sv)
833	{	971	{
		972	struct coro *coro;
		973
		974	if (SvROK (coro_sv))
		975	coro_sv = SvRV (coro_sv);
		976
		977	coro = SvSTATE (coro_sv);
		978
		979	if (coro->flags & CF_READY)
		980	return 0;
		981
		982	coro->flags |= CF_READY;
		983
		984	LOCK;
834	coro_enq (SvREFCNT_inc (coro));	985	coro_enq (SvREFCNT_inc (coro_sv));
835	}	986	UNLOCK;
836		987
		988	return 1;
		989	}
		990
837	static void	991	static int
838	api_schedule (int cede)	992	api_is_ready (SV *coro_sv)
839	{	993	{
		994	return !!(SvSTATE (coro_sv)->flags & CF_READY);
		995	}
		996
		997	static void
		998	prepare_schedule (struct transfer_args *ta)
		999	{
840	SV *prev, *next;	1000	SV *prev_sv, *next_sv;
841		1001
842	prev = GvSV (coro_current);	1002	for (;;)
843		1003	{
844	if (cede)	1004	LOCK;
845	coro_enq (SvREFCNT_inc (prev));
846
847	next = coro_deq (PRIO_MIN);	1005	next_sv = coro_deq (PRIO_MIN);
		1006	UNLOCK;
848		1007
		1008	/* nothing to schedule: call the idle handler */
849	if (!next)	1009	if (!next_sv)
850	next = SvREFCNT_inc (GvSV (coro_idle));	1010	{
		1011	dSP;
851		1012
852	GvSV (coro_current) = SvREFCNT_inc (next);	1013	ENTER;
853	transfer (aTHX_	1014	SAVETMPS;
854	sv_to_coro (prev, "Coro::schedule", "current coroutine"),	1015
855	sv_to_coro (next, "Coro::schedule", "next coroutine"),	1016	PUSHMARK (SP);
856	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);	1017	PUTBACK;
		1018	call_sv (get_sv ("Coro::idle", FALSE), G_DISCARD);
		1019
		1020	FREETMPS;
		1021	LEAVE;
		1022	continue;
		1023	}
		1024
		1025	ta->next = SvSTATE (next_sv);
		1026
		1027	/* cannot transfer to destroyed coros, skip and look for next */
		1028	if (ta->next->flags & CF_DESTROYED)
		1029	{
857	SvREFCNT_dec (next);	1030	SvREFCNT_dec (next_sv);
858	SvREFCNT_dec (prev);	1031	continue;
		1032	}
		1033
		1034	break;
		1035	}
		1036
		1037	/* free this only after the transfer */
		1038	prev_sv = SvRV (coro_current);
		1039	SvRV_set (coro_current, next_sv);
		1040	ta->prev = SvSTATE (prev_sv);
		1041
		1042	assert (ta->next->flags & CF_READY);
		1043	ta->next->flags &= ~CF_READY;
		1044
		1045	LOCK;
		1046	free_coro_mortal ();
		1047	coro_mortal = prev_sv;
		1048	UNLOCK;
		1049	}
		1050
		1051	static void
		1052	prepare_cede (struct transfer_args *ta)
		1053	{
		1054	api_ready (coro_current);
		1055	prepare_schedule (ta);
		1056	}
		1057
		1058	static int
		1059	prepare_cede_notself (struct transfer_args *ta)
		1060	{
		1061	if (coro_nready)
		1062	{
		1063	SV *prev = SvRV (coro_current);
		1064	prepare_schedule (ta);
		1065	api_ready (prev);
		1066	return 1;
		1067	}
		1068	else
		1069	return 0;
		1070	}
		1071
		1072	static void
		1073	api_schedule (void)
		1074	{
		1075	struct transfer_args ta;
		1076
		1077	prepare_schedule (&ta);
		1078	TRANSFER (ta);
		1079	}
		1080
		1081	static int
		1082	api_cede (void)
		1083	{
		1084	struct transfer_args ta;
		1085
		1086	prepare_cede (&ta);
		1087
		1088	if (ta.prev != ta.next)
		1089	{
		1090	TRANSFER (ta);
		1091	return 1;
		1092	}
		1093	else
		1094	return 0;
		1095	}
		1096
		1097	static int
		1098	api_cede_notself (void)
		1099	{
		1100	struct transfer_args ta;
		1101
		1102	if (prepare_cede_notself (&ta))
		1103	{
		1104	TRANSFER (ta);
		1105	return 1;
		1106	}
		1107	else
		1108	return 0;
859	}	1109	}
860		1110
861	MODULE = Coro::State PACKAGE = Coro::State	1111	MODULE = Coro::State PACKAGE = Coro::State
862		1112
863	PROTOTYPES: ENABLE	1113	PROTOTYPES: DISABLE
864		1114
865	BOOT:	1115	BOOT:
866	{ /* {} necessary for stoopid perl-5.6.x */	1116	{
867	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);	1117	#ifdef USE_ITHREADS
868	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);	1118	MUTEX_INIT (&coro_mutex);
		1119	#endif
		1120	BOOT_PAGESIZE;
		1121
869	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1122	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
870		1123
871	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1124	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (CORO_SAVE_DEFAV));
872	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1125	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (CORO_SAVE_DEFSV));
873	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1126	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (CORO_SAVE_ERRSV));
		1127	newCONSTSUB (coro_state_stash, "SAVE_IRSSV", newSViv (CORO_SAVE_IRSSV));
874	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));	1128	newCONSTSUB (coro_state_stash, "SAVE_ALL", newSViv (CORO_SAVE_ALL));
875
876	if (!padlist_cache)
877	padlist_cache = newHV ();
878		1129
879	main_mainstack = PL_mainstack;	1130	main_mainstack = PL_mainstack;
880		1131
881	coroapi.ver = CORO_API_VERSION;	1132	coroapi.ver = CORO_API_VERSION;
882	coroapi.transfer = api_transfer;	1133	coroapi.transfer = api_transfer;
883	}
884		1134
885	Coro::State	1135	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
886	_newprocess(args)	1136	}
887	SV * args	1137
888	PROTOTYPE: $	1138	SV *
		1139	new (char *klass, ...)
889	CODE:	1140	CODE:
890	Coro__State coro;	1141	{
		1142	struct coro *coro;
		1143	HV *hv;
		1144	int i;
891		1145
892	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
893	croak ("Coro::State::_newprocess expects an arrayref");
894
895	New (0, coro, 1, struct coro);	1146	Newz (0, coro, 1, struct coro);
		1147	coro->args = newAV ();
		1148	coro->save = CORO_SAVE_ALL;
		1149	coro->flags = CF_NEW;
896		1150
897	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1151	hv = newHV ();
898	coro->mainstack = 0; /* actual work is done inside transfer */	1152	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
899	coro->stack = 0;	1153	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
900		1154
901	RETVAL = coro;	1155	for (i = 1; i < items; i++)
		1156	av_push (coro->args, newSVsv (ST (i)));
		1157	}
902	OUTPUT:	1158	OUTPUT:
903	RETVAL	1159	RETVAL
904		1160
		1161	int
		1162	save (SV *coro, int new_save = -1)
		1163	CODE:
		1164	RETVAL = api_save (coro, new_save);
		1165	OUTPUT:
		1166	RETVAL
		1167
905	void	1168	void
906	transfer(prev, next, flags)	1169	_set_stacklevel (...)
907	Coro::State_or_hashref prev	1170	ALIAS:
908	Coro::State_or_hashref next	1171	Coro::State::transfer = 1
909	int flags	1172	Coro::schedule = 2
910	PROTOTYPE: @	1173	Coro::cede = 3
		1174	Coro::cede_notself = 4
911	CODE:	1175	CODE:
912	PUTBACK;	1176	{
913	transfer (aTHX_ prev, next, flags);	1177	struct transfer_args ta;
914	SPAGAIN;	1178
		1179	switch (ix)
		1180	{
		1181	case 0:
		1182	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1183	ta.next = 0;
		1184	break;
		1185
		1186	case 1:
		1187	if (items != 2)
		1188	croak ("Coro::State::transfer (prev,next) expects two arguments, not %d", items);
		1189
		1190	prepare_transfer (&ta, ST (0), ST (1));
		1191	break;
		1192
		1193	case 2:
		1194	prepare_schedule (&ta);
		1195	break;
		1196
		1197	case 3:
		1198	prepare_cede (&ta);
		1199	break;
		1200
		1201	case 4:
		1202	if (!prepare_cede_notself (&ta))
		1203	XSRETURN_EMPTY;
		1204
		1205	break;
		1206	}
		1207
		1208	BARRIER;
		1209	TRANSFER (ta);
		1210
		1211	if (GIMME_V != G_VOID && ta.next != ta.prev)
		1212	XSRETURN_YES;
		1213	}
		1214
		1215	bool
		1216	_destroy (SV *coro_sv)
		1217	CODE:
		1218	RETVAL = coro_state_destroy (SvSTATE (coro_sv));
		1219	OUTPUT:
		1220	RETVAL
915		1221
916	void	1222	void
917	DESTROY(coro)
918	Coro::State coro
919	CODE:
920
921	if (coro->mainstack && coro->mainstack != main_mainstack)
922	{
923	struct coro temp;
924
925	SAVE(aTHX_ (&temp), TRANSFER_SAVE_ALL);
926	LOAD(aTHX_ coro);
927
928	destroy_stacks (aTHX);
929
930	LOAD((&temp)); /* this will get rid of defsv etc.. */
931
932	coro->mainstack = 0;
933	}
934
935	deallocate_stack (coro);
936
937	Safefree (coro);
938
939	void
940	flush()
941	CODE:
942	#ifdef MAY_FLUSH
943	flush_padlist_cache ();
944	#endif
945
946	void
947	_exit(code)	1223	_exit (code)
948	int code	1224	int code
949	PROTOTYPE: $	1225	PROTOTYPE: $
950	CODE:	1226	CODE:
951	#if defined(__GLIBC__) || _POSIX_C_SOURCE
952	_exit (code);	1227	_exit (code);
953	#else
954	signal (SIGTERM, SIG_DFL);
955	raise (SIGTERM);
956	exit (code);
957	#endif
958		1228
959	MODULE = Coro::State PACKAGE = Coro::Cont	1229	int
		1230	cctx_count ()
		1231	CODE:
		1232	RETVAL = cctx_count;
		1233	OUTPUT:
		1234	RETVAL
960		1235
961	# this is slightly dirty (should expose a c-level api)	1236	int
962		1237	cctx_idle ()
963	void	1238	CODE:
964	yield(...)	1239	RETVAL = cctx_idle;
965	PROTOTYPE: @	1240	OUTPUT:
966	CODE:	1241	RETVAL
967	static SV *returnstk;
968	SV *sv;
969	AV *defav = GvAV (PL_defgv);
970	struct coro *prev, *next;
971
972	if (!returnstk)
973	returnstk = SvRV (get_sv ("Coro::Cont::return", FALSE));
974
975	/* set up @_ -- ugly */
976	av_clear (defav);
977	av_fill (defav, items - 1);
978	while (items--)
979	av_store (defav, items, SvREFCNT_inc (ST(items)));
980
981	mg_get (returnstk); /* isn't documentation wrong for mg_get? */
982	sv = av_pop ((AV *)SvRV (returnstk));
983	prev = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0)));
984	next = (struct coro *)SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0)));
985	SvREFCNT_dec (sv);
986
987	transfer(aTHX_ prev, next, 0);
988		1242
989	MODULE = Coro::State PACKAGE = Coro	1243	MODULE = Coro::State PACKAGE = Coro
990		1244
991	# this is slightly dirty (should expose a c-level api)
992
993	BOOT:	1245	BOOT:
994	{	1246	{
995	int i;	1247	int i;
		1248
996	HV *stash = gv_stashpv ("Coro", TRUE);	1249	coro_stash = gv_stashpv ("Coro", TRUE);
997		1250
998	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1251	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
999	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1252	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1000	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1253	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1001	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1254	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1002	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1255	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1003	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1256	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1004		1257
1005	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1258	coro_current = get_sv ("Coro::current", FALSE);
1006	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1259	SvREADONLY_on (coro_current);
1007		1260
1008	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1261	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
1009	coro_ready[i] = newAV ();	1262	coro_ready[i] = newAV ();
1010		1263
1011	{	1264	{
1012	SV *sv = perl_get_sv("Coro::API", 1);	1265	SV *sv = perl_get_sv("Coro::API", 1);
1013		1266
1014	coroapi.schedule = api_schedule;	1267	coroapi.schedule = api_schedule;
		1268	coroapi.save = api_save;
		1269	coroapi.cede = api_cede;
		1270	coroapi.cede_notself = api_cede_notself;
1015	coroapi.ready = api_ready;	1271	coroapi.ready = api_ready;
		1272	coroapi.is_ready = api_is_ready;
1016	coroapi.nready = &coro_nready;	1273	coroapi.nready = &coro_nready;
1017	coroapi.current = coro_current;	1274	coroapi.current = coro_current;
1018		1275
1019	GCoroAPI = &coroapi;	1276	GCoroAPI = &coroapi;
1020	sv_setiv(sv, (IV)&coroapi);	1277	sv_setiv (sv, (IV)&coroapi);
1021	SvREADONLY_on(sv);	1278	SvREADONLY_on (sv);
1022	}	1279	}
1023	}	1280	}
1024		1281
1025	void	1282	void
1026	ready(self)	1283	_set_current (SV *current)
1027	SV * self	1284	PROTOTYPE: $
1028	CODE:	1285	CODE:
1029	api_ready (self);	1286	SvREFCNT_dec (SvRV (coro_current));
		1287	SvRV_set (coro_current, SvREFCNT_inc (SvRV (current)));
1030		1288
1031	int	1289	int
		1290	prio (Coro::State coro, int newprio = 0)
		1291	ALIAS:
		1292	nice = 1
		1293	CODE:
		1294	{
		1295	RETVAL = coro->prio;
		1296
		1297	if (items > 1)
		1298	{
		1299	if (ix)
		1300	newprio = coro->prio - newprio;
		1301
		1302	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1303	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1304
		1305	coro->prio = newprio;
		1306	}
		1307	}
		1308	OUTPUT:
		1309	RETVAL
		1310
		1311	SV *
		1312	ready (SV *self)
		1313	PROTOTYPE: $
		1314	CODE:
		1315	RETVAL = boolSV (api_ready (self));
		1316	OUTPUT:
		1317	RETVAL
		1318
		1319	SV *
		1320	is_ready (SV *self)
		1321	PROTOTYPE: $
		1322	CODE:
		1323	RETVAL = boolSV (api_is_ready (self));
		1324	OUTPUT:
		1325	RETVAL
		1326
		1327	int
1032	nready(...)	1328	nready (...)
1033	PROTOTYPE:	1329	PROTOTYPE:
1034	CODE:	1330	CODE:
1035	RETVAL = coro_nready;	1331	RETVAL = coro_nready;
1036	OUTPUT:	1332	OUTPUT:
1037	RETVAL	1333	RETVAL
1038		1334
		1335	MODULE = Coro::State PACKAGE = Coro::AIO
		1336
		1337	SV *
		1338	_get_state ()
		1339	CODE:
		1340	{
		1341	struct io_state *data;
		1342
		1343	RETVAL = newSV (sizeof (struct io_state));
		1344	data = (struct io_state *)SvPVX (RETVAL);
		1345	SvCUR_set (RETVAL, sizeof (struct io_state));
		1346	SvPOK_only (RETVAL);
		1347
		1348	data->errorno = errno;
		1349	data->laststype = PL_laststype;
		1350	data->laststatval = PL_laststatval;
		1351	data->statcache = PL_statcache;
		1352	}
		1353	OUTPUT:
		1354	RETVAL
		1355
1039	void	1356	void
1040	schedule(...)	1357	_set_state (char *data_)
1041	PROTOTYPE:	1358	PROTOTYPE: $
1042	ALIAS:
1043	cede = 1
1044	CODE:	1359	CODE:
1045	api_schedule (ix);	1360	{
		1361	struct io_state *data = (void *)data_;
1046		1362
		1363	errno = data->errorno;
		1364	PL_laststype = data->laststype;
		1365	PL_laststatval = data->laststatval;
		1366	PL_statcache = data->statcache;
		1367	}
		1368

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